DE1790034A1 - Metal-enclosed pressurized gas switch, which is used exclusively to interrupt a circuit - Google Patents

Description

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gelfffaeii MoIM; or bo start leaks that the gas feed system is never in working order, in the Iteä ^ rirwekraum the required pressure SUfS ² SClItSUeJJ ¹ JIaI ^ sS] ₁ the pressure of the gas in the low pressure

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2? Essi asfeesis M, a / at »« -: * spherical pressure "or up to., A too niefeigos U> sliGi? Ö]? Iißk decreases, and that if the switching contacts saaela äos - iBesetialtvorgaKg remain separate from each other or la lick eiagesekalteten state of the switch so much that & L © issspeiseanlag® required in the cooking pressure chamber Ueberdsraek can maintain Eicht, the pressure of the grass in HeeMruökrauiB almost BAW to / the prescribed in Nitderdruckraum overpressure. to a higher to lower positive pressure since abnimmte the gas into the If the switch is used to isolate the live parts at the same time, the isolation is ensured by reducing the pressures in these spaces to below the designed lowest excess pressure *

The purpose of the invention is to avoid this risk completely or almost completely . "It consists in the fact that the discharge channel © in®" has a second part that works like a safety valve and means are arranged to control this safety valve®, which means keep the safety valve open, if the pressure in the high-pressure room and the pressure in the low-pressure room have values that are higher than limit values, which are certain values higher than the lowest pressures permitted in these trees, and the safety valve closes when the pressure in the high-pressure room or / uh the pressure in the low-pressure room until below this limit value »falls (falls).

A simple execution to achieve the intended

The purpose is obtained by having the means of control

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BATH ORIGINAL

The safety valve consists of a spring that closes this valve and a double-acting cylinder with piston that serves both to open and to close this valve, from which cylinder the cylinder chamber to the opening of the safety valve with the lower pressure chamber in. open Terbin & ung stands and outer lyliriderrauE for closing this valve through a switch valve can either be set in contact with the outside air or with the HooMrusk space, and that this switch valve by a spring "sa single-acting cylinder with a basket that counteracts ^{this eclea 1} is controlled which ■ · ■ Seder to put the UsisefoaXtveatil into the state

looking for _? in which the feetrsff e.uds. The cylinder chamber of the double-acting cylinder is connected to the Hem Hocfairbackraum ", and from which-"simple.working cylinder Άοί? mrksasae% linderraum with the high pressure room lsi oft & ner TerMsidusig sees _o

■ _f BrfinduEg is ai country werdea of ¹ Abig ,. which represents a vertical section siases close to the definition. .

• In the Zeicfem? Ag, the pressure gas switch intended for the circuit "is provided with a metal container 1 in which the switching element is isolated and carried by isolates at 2 and 3. This switching element is carried by two Fixed ear contacts 4 »5 and a cooperating, axially movable, ring-shaped switching contact 6, which is connected by an insulating rod 7 to a drive rod 8. The fixed ear contacts 4, 5" are each formed by a metal expansion chamber 9 »10 si * cooling rings 11, 12 worn and si «> iateäeB 2 & in such a chamber. These expansion chambers 9 »10

0098 23/06 0 5 SAD

_aM,. ^ ei_ ^ ^ «^, olJJ? ^ " Miaetaroiigefithrten conductors 15, 16 for connecting the switch to & @ S83? ei5 circuit connected.

In the steady-state operating state, the switch is isolated from the space 17, the switching element 4 »5» 6 and the area chamber. 9t 10 surrounds, is then separated from the RSumen 18j, 19 »20, which are located within the expansion channels 9» 10 and above the expansion chamber 10 and torch tubes 21 made of insulating material are in communication with one another. The space 17 is with insulating gas

φ filled under high pressure p, which in the stationary, i.e.

when the switch is switched on, e.g. 15 atm. amounts to. The RSumes 18, 19 »20 are in the stationary state of the switch filled with the same insulating gas under a lower pressure Pg, e.g. 5 atm. amounts to. So all RMume within of the vessel 1 contain insulating gas under excess pressure. By using gas under excess pressure, the insulation value of the gas filling is greatly increased. and thereby the insulating distances in the switch can be made smaller

~ are used as if only using atmospheric pressure gas will. This means, however, that if the overpressure of the insulating gas is too small, the insulation of the energized gas The switch ropes become inadequate and pose a risk to one Earth fault exists. The gas is through a line 22 to the high pressure chamber 17 and through a line 23 cum low pressure chamber 18, 19 »20 out.

During the disconnection process, the movable switching contact 6 is pulled upwards so that it is separated from the fixed pipe contact 4 and the high-pressure space 17 is placed in open connection _{with the low-pressure rotor 18 9 19 20.} Strong gas *

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l'iistsii Staaä stecfeii remains or leaks in the switched on iss switch so si-aric that the dining system Gii'ö iao'feaiilö i. &t; d «ae * ε- / · arch occurring gas loss in the zl ^r . .1> ii, j ^ rgäßzsa · In this case the pressure i ^{7 /} ~ "- _{t could} decrease below that in this space still -. ££ * tsa Bruekea p« ¹ which is lower than. "Va ^ fc p. is isiid ss »3, 10 atm. cheats. In both l. ·. ^ ^ L ¹ L,?:, 'Iasia, the

ay »" 3.4sö ^-1 5 Sefahr zn irtrmeiden, is arranged according to the Brfin- gc!: i Ci ^ 'ierJieitsventil 29, which makes that the

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17 wsiü, in ITiedardruekraum 18, 19, 20 bis, the values } «* ^ 4P <, ⁸ ti2id p _ft '+ ΔΡο ** iUh · until values decrease that a.

7323i (S ofeerhslli € er Geistatii ^ is lowest ^ values p- ^f and p _o ^f lying would in the present case, for example, 11 atm. And 3 »85 atm.

Iweek the Siclier & eiteventil 29 is loaded by a 30 and coupled with a piston 31, which is arranged in clopp®ltwis * kenden cylinder 32 · The cylinder space 33 of this cylinder stands with the lower pressure space 18, 19? 20 in open connection, and the cylinder space 34- this ijlindere is connected by a line 35 with the chamber 36 of a UmsohaltTentilea 37, which in the state shown the cylinder space 34 via the line 35, the chamber 36 and an opening 38 in connection with the outside air sets and in the other state the opening 38 closes and this cylinder space 34 via the line 35 "the chamber 36 and an opening 39 with the effective cylinder space 40 of a single-acting cylinder 41 with a spring 43 loaded by a sound of an adjusting screw" 42 adjustable piston 44 and over tinea channel 4-5 »lt the Hoohdruokraum rerbindet _8AD ORIGINAL

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009823/0605

From the above it follows »that the! Compressed gas switch should be designed and work in such a way that the amount of extinguishing gas required to extinguish the retaining arch does not lower the pressure in the high pressure chamber 17 to below the value ρ .. ¹ + δρ ^ Atm. degrades. In some cases, the closing of the safety valve can be used at the same time to limit the amount of gas used during the switch-off process. Furthermore, the gas feed system must be set in such a way that the supply of gas to the low pressure chamber only takes place when the pressure in this tree has _{decreased to below a value p 2} '+ ΔΡ2 ¹ i * fc% ,

009823/0605

BATH

Claims (1)

Case 102 ■ -9- ^. 179003 * 1 _e J Hetallu & closed pressurized gas switch, which is used exclusively to break a circuit and with a metal vessel and an isolated switch box. ment. that is surrounded by a high pressure tube filled with gas under pressure and contains at least two sehaltkontakt © that can be separated from each other to cover the circuit, vosi & © n @ 2a at least one is an ear contact The cavity in the switched-on state is closed by the other switch contact and, in a low-pressure room filled with Sas under lower excess pressure, so that the high-pressure room and the low-pressure room are separated from one another when the switch is switched on, but during the switch-off process the ear contact pass through each other in open tel? - .atshen which Uiederdruckraum has a Iblasskanal duroh with a spring-loaded EüOkschlagventil _s, the lower hMlt that this channel is closed, when the pressure has the Gfases in Uiederdruckraum a ■■ Ufert than a given üeberdruck corresponding Srenswert, and W thereof. Xasaal-opens when this pressure exceeds this Grejsawert, 'characterized ^ ted b y ak Qiohnet that the Ablassksnal. ·., A safety valve wi® (29) operating second! Has valve and means (30-45) for controlling this safety valve a (29) arranged, which means keep the safety valve open when the pressure in the high pressure chamber (17) and the pressure in the media pressure chamber (18, 19 $ 20) have values that are higher than thresholds that certain values (Δ P ₁ 'P ₂ bzw.δ') higher than the permitted by these trees niedrigettn prints (p ^ 'or P ₂ · ¹⁾ and the safety;. ■ = 00982 · 3/06 0 5 _eAD ■ The safety valve (29) close when the chunk in the high pressure chamber (17) or (and) the pressure in the low pressure chamber (18, 19, 20) _{falls below this limit value (P 1} * + AP ₁ * or ρ « ¹ + ΔΡο ¹ ) fSllt (fall). 2 Metal-enclosed gas switch according to claim 1 daflfflpph , (characterized in that the means for controlling the safety valve (29) consist of a spring (30) serving to close this valve and a double-acting cylinder (32) serving both to open and to close this valve with piston (31), which cylinder (32) the cylinder chamber (33) for opening the safety valve (29) is in open connection with the low pressure chamber (18, 19 »20) and the cylinder chamber (34) for closing this valve a switching valve (37) can be connected either to the outside air or to the high-pressure chamber (17), and that this switching valve (37) is connected to one of these springs (43) by a spring (43) and a single-acting cylinder (41) counteracting piston (44) is controlled, which leather (43) tries to put the switching valve (37) in the state in which the relevant cylinder space (34) of the double-acting cylinder (32) is connected to the high-pressure chamber (17), and of which single-acting cylinder (41) the active cylinder chamber (40) is in open connection with the high-pressure chamber (17). Patent attorney 0 9 8 2 3/0605